Sizable Composite Tube Bicycle Frame and Method of Making

Abstract

A sizable reduced weight bicycle frame and method for making such incorporating tubes of a composite material, the method providing for flexibility and full customization of the bicycle frame with a minimum amount of tooling, which tooling securely holds lugs of the bicycle frame at selected customized positions relative to the tooling during the molding process.

1 . A system for fabricating a bicycle frame comprising: 
 a mold body having an inner molding surface;    a first portion at least partially in contact with said inner molding surface;    a second portion at least partially in contact with said inner molding surface;    an attachment device for connecting at least one of said first and second portions to one of multiple positions in said mold body to size the bicycle frame; and    a composite material placed within the mold body between and within at least a part of the first and second portions.    
   
   
       2 . The system according to  claim 1  wherein said attachment device comprises a pin insertable into a tooling hole provided in at least one of the first and second portions.  
   
   
       3 . The system according to  claim 2  further comprising at least a first molding hole positioned in said mold body.  
   
   
       4 . The system according to  claim 3  wherein upon the expanding of a bladder located within the composite material, the composite material adheres at least to said first portion.  
   
   
       5 . A method for fabricating a bicycle frame comprising the steps of: 
 providing a mold body having an inner molding surface;    providing a first portion at least partially in contact with the inner molding surface;    providing a second portion at least partially in contact with the inner molding surface;    providing an attachment device for connecting at least one of said first and second portions to one of multiple positions in said mold body to size the bicycle frame; and    providing a composite material placed within the mold body between and within at least a part of the first and second portions.    
   
   
       6 . The method according to  claim 5  wherein said attachment device comprises a pin insertable into a tooling hole provided in at least one of the first and second portions.  
   
   
       7 . The method according to  claim 5  further comprising the step of positioning at least a first molding hole in the mold body.  
   
   
       8 . The system according to  claim 7  wherein upon the expanding of a bladder located within the composite material, the composite material adheres at least to the first portion.  
   
   
       9 . A method for fabricating a bicycle frame comprising the steps of: 
 cutting a composite material to a desired length;    inserting the composite material into an end of a first portion;    positioning an adhesive layer between an inner surface of the first portion and the composite material; and    adhering the composite material to the first portion such that the adhesive layer is sandwiched between the composite material and the inner surface of the first portion.    
   
   
       10 . The method according to  claim 9  further comprising the step of positioning a hole in the first portion.  
   
   
       11 . The method according to  claim 10  further comprising the step of forming a protrusion from the composite material in the hole to interlock the first portion with the composite material.  
   
   
       12 . The method according to  claim 9  wherein the composite material is pre-impregnated with resin.  
   
   
       13 . The method according to  claim 9  wherein the composite material comprises structural fibers and resin.  
   
   
       14 . The method according to  claim 13  wherein the structural fiber is selected from the group consisting of carbon fibers, glass fibers, polyethylene fibers, or combinations thereof.  
   
   
       15 . The method according to  claim 9  wherein the first portion comprises a bicycle frame lug.  
   
   
       16 . The method according to  claim 9  wherein the step of adhering the composite material to the first portion includes forcing air into a bladder positioned inside of the composite material.  
   
   
       17 . A system for fabricating a bicycle frame comprising: 
 a mold body having an inner molding surface;    a composite material placed within the mold body and at least partly within a frame portion the inner molding surface encasing both the composite material and at least a part of the frame portion; and    an attachment device for connecting said frame portion to one of multiple positions in said mold body to size the bicycle frame.    
   
   
       18 . The system according to  claim 17  wherein said attachment device comprises a pin insertable into a tooling hole provided in the frame portion.  
   
   
       19 . A method for manufacturing a bicycle frame comprising the steps of: 
 providing a first portion;    providing a second portion;    extending a composite material between said first and second portions, the composite material sized according to a preferred distance between the first and second portions; and    positioning an adhesive layer between an inner surface of at least the first portion and the composite material to adhere the composite material to at least the first portion.    
   
   
       20 . The method according to  claim 19  further comprising the step of locating a hole in the first portion.  
   
   
       21 . The method according to  claim 20  further comprising the step of locating a protrusion in the hole, the protrusion being formed from the composite material and interlocking the first portion with the composite material.  
   
   
       22 . The method according to  claim 19  wherein the composite material is pre-impregnated with resin.  
   
   
       23 . The method according to  claim 19  wherein the composite material comprises structural fibers and resin.  
   
   
       24 . The method according to  claim 23  wherein the structural fiber is selected from the group consisting of carbon fibers, glass fibers, polyethylene fibers, or combinations thereof.  
   
   
       25 . The method according to  claim 19  wherein said first and said second portions comprise bicycle frame lugs.